Adding new line of data to TextBox

Question

I m doing a chat client  and currently I have a button that will display data to a multi-line textbox when clicked  Is this the only way to add data to the multi-line textbox  I feel this is extremely inefficient  because if the conversation gets really long the string will get really long as well   private void button1 Click object sender  EventArgs e                        string sent   chatBox Text              displayBox Text    sent     r n

User · Answer

C  - serialData is ReceivedEventHandler in TextBox   SerialPort sData   sender as SerialPort  string recvData   sData ReadLine     serialData Invoke new Action      gt  serialData Text   String Concat recvData       Now Visual Studio drops my lines  TextBox  of course  had all the correct options on   Serial   Serial print rnd   Serial     n        carriage return

User · Answer

Following are the ways   From the code  the way you have mentioned  -   displayBox Text    sent     r n     or  displayBox Text    sent   Environment NewLine   From the UI a  WPF  Set TextWrapping  Wrap  and AcceptsReturn  True       Press Enter key to the textbox and new line will be created  b  Winform text box      Set TextBox MultiLine and TextBox AcceptsReturn to true

User · Answer

If you use WinForms   Use the AppendText myTxt  method on the TextBox instead   net 3 5         private void button1 Click object sender  EventArgs e                string sent   chatBox Text           displayBox AppendText sent           displayBox AppendText Environment NewLine            Text in itself has typically a low memory footprint  you can say a lot within f ex  10kb which is  nothing    The TextBox does not render all text that is in the buffer  only the visible part so you don t need to worry too much about lag  The slower operations are inserting text  Appending text is relatively fast   If you need a more complex handling of the content you can use StringBuilder combined with the textbox  This will give you a very efficient way of handling text

User · Answer

I find this method saves a lot of typing  and prevents a lot of typos   string nl     r n    txtOutput Text    First line    nl    Second line    nl    Third line

User · Answer

Because you haven t specified what front end  GUI technology  you re using it would be hard to make a specific recommendation   In WPF you could create a listbox and for each new line of chat add a new listboxitem to the end of the collection   This link provides some suggestions as to how you may achieve the same result in a winforms environment

[c#] Adding new line of data to TextBox

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